Application of amine-functioned Fe3O4 nanoparticles with HPEI for effective humic acid removal from aqueous solution: Modeling and optimization
| Autor: | Seyedeh Mahtab Pormazar, Arash Dalvand, Mohammad Taghi Ghaneian, Parvaneh Talebi, Mohammad Hassan Ehrampoush, Mehdi Khoobi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Polyethylenimine Aqueous solution General Chemical Engineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology chemistry.chemical_compound Adsorption 020401 chemical engineering chemistry Ionic strength Humic acid Amine gas treating Freundlich equation 0204 chemical engineering 0210 nano-technology Nuclear chemistry BET theory |
| Zdroj: | Korean Journal of Chemical Engineering. 37:93-104 |
| ISSN: | 1975-7220 0256-1115 |
| Popis: | Humic acids are one type of natural organic matter and precursors of chloro organic compounds that cause a major problematic issue for water treatment plants. In the present study, Hyperbranched polyethylenimine (HPEI) was grafted onto Fe3O4 nanoparticles for HA adsorption from aqueous solution. Fe3O4@HPEI nanoparticles were characterized via TEM, SEM, FTIR, XRD, VSM, and BET analysis. The effects of various operational parameters including initial HA concentration, pH, adsorbent dose, contact time and ionic strength on the HA removal were assessed. According to the obtained statistical model, the optimal condition was acquired at the initial HA concentration 79 mg/L, adsorbent dose 0.128 g/L, pH 3 and contact time 29 min, which up to 97.27% HA were adsorbed by Fe3O4@HPEI that was close to the predicted result by the model (95.6%) that confirmed the validity of the selected model. The adsorption data were fitted to the pseudo-second-order kinetic and Freundlich isotherm. Thermodynamic parameters indicated that the adsorption process was spontaneous and endothermic. The fabricated Fe3O4@HPEI nanoparticles could be repeatedly utilized as a suitable adsorbent to remove HA from the aqueous environment. |
| Databáze: | OpenAIRE |
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